504
Keysight NFA Series Noise Figure Analyzers Service Guide
Functional Tests
Amplitude Accuracy at 50 MHz
Testing Preamp Option (P03, P07, P26, P44)
Instruments containing Options P03, P07, P26, P44 must have the preamp
function turned on and tested.
Procedure
1.
On the analyzer, press
MODE/MEAS
,
Spectrum Analyzer
,
OK
,
AMPTD,
Signal Path
,
Internal Preamp
,
Low Band
.
2.
Connect the equipment as shown in
, using a
30 dB Pad between the adapter and the signal analyzer input.
3.
Set the synthesized sweeper amplitude to the value listed in the Nominal
.
4.
Set the signal analyzer input attenuation to 0 dB.
5.
Set the Span as listed in
.
6.
Record the source amplitude, as measured by the power meter, in the
Power Meter Amplitude column of
.
7.
On the signal analyzer, press
Restart
.
8.
Wait for the analyzer to finish averaging.
9.
Press
Peak Search
.
10.
Record the signal amplitude as measured by the analyzer in the measured
amplitude column of
11.
Calculate the signal amplitude accuracy using the following equation:
Amplitude Accuracy Error
=
Meas_amp
+
30 dB
-
Power_meter
12.
Record the results under the Amplitude Accuracy Error column of
Table 17-7
Amplitude Accuracy Results (Option P03, P07, P26, P44)
Nominal
Source
Amplitude
(dBm)
Low- band
Preamp
Res BW
(kHz)
Span
(kHz)
Measured
Amplitude
Meas_amp
(dBm)
Power Meter
Amplitude
Power_meter
(dBm)
Amplitude
Accuracy
Error
(dB)
Test Limit
(dB)
-
13
ON
1
106
±1.30 dB
Содержание N8973B
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